Published March Minn Med. Marijuana is addicting, has adverse effects upon the adolescent brain, is a risk for both cardio-respiratory disease and testicular cancer, and is associated with both psychiatric illness and negative social outcomes. The researchers found a significant dose-response effect for each of these.
Other studies have also shown a link between prolonged marijuana use and cognitive or neural impairment. Diversion of marijuana from Colorado to other states has also increased several fold.
Study links marijuana use to testicular cancer. After adjusting for co-variables, compared to those who never used cannabis prior to age 17 OR 1. Centers for Disease Control and Prevention have more about marijuana use in teens.
Dilley and Susan M.